Francis h



(No Model.)

P.H.CRAPTSQ CHIP BREAKER.

Fig.2.

11 ml x 2 l" Witnesses.

04V Inventor.

. @y firm; 19

lJNiTE. stares PATENT rrrcn.

FRANCIS H. CRAFTS, OF BUFFALO, NElV YORK, ASSIGNOR TO E. & B. HOLMES,

OF SAME PLACE.

CHIP-BREAKER.-

SPECIFICATION forming part of Letters Patent No. 397,834, dated February12, 1889. Application filed November 17, 1887. Serialllo. 255,385. (Nomodel.)

To all whom it may concern:

Be it known that 1, FRANCIS H. CRAFTS, a citizen of theUnited States,residin gin Buffalo, in the county of Erie and State of New York,

haveinvented certainnew and useful Improvements in Chip-Breakers, ofwhich the following is a specification.

My invention relates to certain improve ments in chip-breakers forsurfacing and matching machines, and will be fully and clearlyhereinafter described and claimed, reference being had to theaccompanying drawings, in which Figure 1 represents aplan or top viewshow- I 5 ing a portion of a machine to which the chipbreaking devicesare connected, showing also a top view of two chip-breakers and theircurved holding-bars in their proper position for working, a portion ofone of the curved 2o holding-bars being cut away, so as to show thewhole of one of the curved chip-breakers. A piece of board to beoperated on is also shown between them. Fig. 2 is a side elevationlooking in the direction of the arrow e in Fig. 1. Fig. 3 represents asection in line ab,

Fig. 1.

Hereto'fore chip-breakers have been made of east-iron, the curvedholding-bars and chipbreaking portion all being formed in one piece,

so that when the chip-breaking portion was worn the whole had to bethrown away and a new one sul'istituted.

The object of my invention is to avoid this objection by using anadjustable curved steel 3 5 chip-breaker capable of being adjusted whenworn until nearly the whole may be used, so that the chip-breaker onlywhen worn out is required to be replaced by a new one.

In said drawings, 1 represents a portion of the top of the machine towhich the device is connected. Y

2 3 are the vertical shafts to which the rotary cutters are attached;but as my invention is designed to be applied to any of the well- 4 5known surfacing and matching machines such as are in common use afurther description here of such machine is not required.

at 5 represent the curved chip-breaker holders, which are made right andleft, as shown,

and are secured to the top of the machine by the bolts 6, so as to swinghorizontally thereon.

7 is a circular or curved vertically-projecting rib, forming the outsiderib, and 8 is a shorter inner rib, the two leaving a curved groove intowhich the curved chip-breakers 9 are nicely fitted, so that they mayeasily move in said groove for adjustment, and then be rigidly securedby the set-screws 10 at any point to which they may be adjusted. Thesechip-breakers 9 are preferably made of caststeel hardened or tempered.The set-screws 10 pass through the top portion, 11, which may be eitherformed in one piece with the curved holding-bar or rigidly attached toit in any well-known way. 6 5

Chip-breakers are usually attached to a machine, as shown in Fig. 1, bybolts 6, so as to turn easily on them, and are drawn toward each other,so as to rest against the edges of the board 12, by means of a lug, 13,which pro- JBOtS down into an opening in the top of the machine to whichit is attached. This opening is shown by dotted lines in Fig. 1 anddesignated by the number 14. To the lugs 13 is a cord, 15, which passesover a grooved friction-roller, 16, and having a weight, 17. (Shown indotted lines in Figs. 2 and 3.)

In operating with this device the board 12, moving in the direction ofthe arrow f and in opposition to the movement of the cutters, So (whichmove in the direction of the arrow g,) wears away the point of thechip-breaker, and when sufficiently worn it may easily be adjustedforward and secured as often as may be required until nearly all usedup; or, when necessary, it may be taken out and reground and theninserted and adjusted.

I claim as my invention- 1. In a chip-breaker, the combination of apivoted curved holding-bar provided with a 0 curved groove, a curvedadjust-able chipbreaker adapted to fitin and be moved around in saidgroove to adj ust it as it wears away, and bolts for securing it at anypointwhen so adjusted, substantially as and for the purposes described.

2. In a chip-breaker, the combination of a pivoted curved holding-barhaving a curved.

groove, a curved adjustable chip-breaker roller and secured 10 a 111g,13, substantially adapted to fit in and be moved around in as described.said groove to adjust it as it Wears away, 1

bolts for securing it at any point when so {Ldjustod, and a 1110:1119:for holding it up to its I \Vitnossos: work, COl'lSiStillg 0f :1 weightconnected with FRANK A. FOX,

a cord passing up and oval-a grooved friction- JAMES SANGSTER.

FRANUIS II. RA l lS.

